Mine parachutes for one-cable lifts and devices with counterweights weighing up to 16 tons – PTKPA. They help keep the mine cage from falling when the rope is loose or broken. The structure of parachutes PTKA and PTKPA includes shock absorbers of the type TA-1M and TA-3M.
The shock absorbers of the TA-1M and TA-3M types are part of the mine parachutes of the PTKA and PTKPA types, and can also be used as part of brake complexes during multi-rope lifting.
Parachutes PTCPA can be operated with counterweights weighing up to 16 tons, with a single-channel lifts of vertical trunks up to 900 m deep, at speed up to 12 m/s, regardless of the type and location of the conductors.